linux-libre-xen: minor fix for armv7h

1 files changed, 56 insertions, 0 deletions

diff --git a/kernels/linux-libre-xen/0011-usb-musb-Call-pm_runtime-from-musb_gadget_queue.patch b/kernels/linux-libre-xen/0011-usb-musb-Call-pm_runtime-from-musb_gadget_queue.patch
new file mode 100644
index 000000000..88d30a42a
--- /dev/null
+++ b/kernels/linux-libre-xen/0011-usb-musb-Call-pm_runtime-from-musb_gadget_queue.patch
@@ -0,0 +1,56 @@
+From 17998b802d18651bd4bfd6ee32e10c166f484e76 Mon Sep 17 00:00:00 2001
+From: Tony Lindgren <tony@atomide.com>
+Date: Fri, 30 Sep 2016 11:10:10 -0700
+Subject: [PATCH 11/13] usb: musb: Call pm_runtime from musb_gadget_queue
+
+If we're booting pandaboard using NFSroot over built-in g_ether, we
+can get the following after booting once and doing a warm reset:
+
+g_ether gadget: ecm_open
+g_ether gadget: notify connect true
+...
+WARNING: CPU: 0 PID: 1 at drivers/bus/omap_l3_noc.c:147
+l3_interrupt_handler+0x220/0x34c
+44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4CFG (Read):
+Data Access in User mode du ring Functional access
+...
+
+Fix the issue by calling pm_runtime functions from
+musb_gadget_queue.
+
+Note that in the long run we should be able to queue the pending
+transfers if pm_runtime is not active, and flush the queue from
+pm_runtime_resume.
+
+Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+Signed-off-by: Tony Lindgren <tony@atomide.com>
+---
+ drivers/usb/musb/musb_gadget.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
+index 6d1e975..8ccc1b1 100644
+--- a/drivers/usb/musb/musb_gadget.c
++++ b/drivers/usb/musb/musb_gadget.c
+@@ -1255,6 +1255,7 @@ static int musb_gadget_queue(struct usb_ep *ep, struct usb_request *req,
+ 
+ 	map_dma_buffer(request, musb, musb_ep);
+ 
++	pm_runtime_get_sync(musb->controller);
+ 	spin_lock_irqsave(&musb->lock, lockflags);
+ 
+ 	/* don't queue if the ep is down */
+@@ -1275,6 +1276,9 @@ static int musb_gadget_queue(struct usb_ep *ep, struct usb_request *req,
+ 
+ unlock:
+ 	spin_unlock_irqrestore(&musb->lock, lockflags);
++	pm_runtime_mark_last_busy(musb->controller);
++	pm_runtime_put_autosuspend(musb->controller);
++
+ 	return status;
+ }
+ 
+-- 
+2.10.2
+